mingw: squash another warning about a cast

dscho · gitster · commit 83c90da3c145 · 2016-01-15T14:02:37.000-08:00
MSys2's compiler is correct that casting a "void *" to a "DWORD" loses
precision, but in the case of pthread_exit() we know that the value
fits into a DWORD.

Just like casting handles to DWORDs, let's work around this issue by
casting to "intrptr_t" first, and immediately cast to the final type.

Signed-off-by: Johannes Schindelin &lt;johannes.schindelin@gmx.de&gt;
Signed-off-by: Junio C Hamano &lt;gitster@pobox.com&gt;
diff --git a/compat/win32/pthread.h b/compat/win32/pthread.h
@@ -77,7 +77,7 @@ extern pthread_t pthread_self(void);
 
 static inline int pthread_exit(void *ret)
 {
-	ExitThread((DWORD)ret);
+	ExitThread((DWORD)(intptr_t)ret);
 }
 
 typedef DWORD pthread_key_t;

Original file line number	Diff line number	Diff line change
`@@ -77,7 +77,7 @@ extern pthread_t pthread_self(void);`
`77`	`77`
`78`	`78`	`static inline int pthread_exit(void *ret)`
`79`	`79`	`{`
`80`		`- ExitThread((DWORD)ret);`
	`80`	`+ ExitThread((DWORD)(intptr_t)ret);`
`81`	`81`	`}`
`82`	`82`
`83`	`83`	`typedef DWORD pthread_key_t;`